// #ifndef APP-PLUS || MP-WEIXIN || H5

export default {
    watch: {
        value(val) {
            this.initData(val)
        },
        endValue(val) {
            if (this.section) {
                this.initEndData(val)
            }
        }
    },
    data() {
        return {
            drag: false,
            startX: 0,
            endX: 0,
            lastLeft: 0,
            useLast: 0,
            lastRight: 0,
            useRight: 0,
            moveLeft: 'translate3d(0,0,0)',
            transLeft: 'translate3d(-100%, 0, 0)',
            moveRight: 'translate3d(0,0,0)',
            transRight: 'translate3d(100%, 0, 0)',
            isRight: false
        }
    },
    mounted() {
        this.initData(this.value)
        if (this.section) {
            this.initEndData(this.endValue)
        }
    },
    methods: {
        initData(value) {
            this.startX = 0;
            this.lastLeft = 0;
            this.drag = false;
            this.styleChange(Number(value), true)
        },
        initEndData(value) {
            this.endX = 0;
            this.lastRight = 0;
            this.drag = false;
            value = Number(this.max) - Number(value) + Number(this.min)
            this.styleSectionChange(value, true)
        },
        format(value) {
            value = Number(value)
            let step = Number(this.step)
            return Math.round(Math.max(Number(this.min), Math.min(value, Number(this.max))) / step) * step;
        },
        touchstart(e) {
            let touch = e.changedTouches[0] || e.touches[0];
            this.startX = touch.clientX
        },
        endTouchstart(e) {
            let touch = e.changedTouches[0] || e.touches[0];
            this.endX = touch.clientX
        },
        changeValue(value, isStart, isEnd) {
            var params = {
                value: value,
                isStart: isStart
            }
            if (isEnd) {
                this.change(params)
            } else {
                this.changing(params)
            }
        },
        styleChange(value, isEnd) {
            value = this.format(value);
            if (this.section) {
                value = value > this.end ? this.end : value;
            }
            this.changeValue(value, true, isEnd)
            const min = Number(this.min)
            const max = Number(this.max)
            var dvalue = max - min;
            var maxWidth = Number(this.width) - Number(this.blockWidth);
            var width = (value - min) / dvalue * maxWidth;
            this.lastLeft = width
            if (isEnd) {
                this.useLast = width
            }
            this.transLeft = `translate3d(-${Number(this.width) - width}px,0,0)`
            this.moveLeft = `translate3d(${width}px,0,0)`
            this.isRight = value === max
        },
        styleSectionChange(value, isEnd) {
            value = this.format(value);
            const min = Number(this.min)
            const max = Number(this.max)
            var total = max + min;
            var val = total - value;
            val = val < this.start ? this.start : val;
            value = total - val;
            this.changeValue(val, false, isEnd)
            var dvalue = max - min;
            var maxWidth = Number(this.width) - Number(this.blockWidth);
            var width = (value - min) / dvalue * maxWidth;
            this.lastRight = width
            if (isEnd) {
                this.useRight = width
            }
            this.transRight = `translate3d(${Number(this.width) - width}px,0,0)`
            this.moveRight = `translate3d(-${width}px,0,0)`
        },
        touchmove(e) {
            if (this.disabled) return;
            let touch = e.changedTouches[0] || e.touches[0];
            let pageX = touch.clientX
            let left = pageX - this.startX + (this.useLast || 0);
            this.drag = true
            left = left < 0 ? 0 : left;
            let maxWidth = Number(this.width) - Number(this.blockWidth);
            left = left >= maxWidth ? maxWidth : left;
            let dvalue = Number(this.max) - Number(this.min);
            let value = (left / maxWidth) * dvalue + Number(this.min);
            this.lastLeft = left
            this.styleChange(value, false)
        },
        endTouchmove(e) {
            if (this.disabled) return;
            let touch = e.changedTouches[0] || e.touches[0];
            let pageX = touch.clientX;
            this.drag = true
            let left = this.endX - pageX + (this.useRight || 0);
            left = left < 0 ? 0 : left;
            let maxWidth = Number(this.width) - Number(this.blockWidth);
            left = left >= maxWidth ? maxWidth : left;
            let dvalue = Number(this.max) - Number(this.min);
            let value = (left / maxWidth) * dvalue + Number(this.min);
            // this.endX = pageX
            this.lastRight = left
            this.styleSectionChange(value, false)
        },
        touchend(e) {
            if (this.disabled) return;
            if (this.drag) {
                let maxWidth = Number(this.width) - Number(this.blockWidth);
                let dvalue = Number(this.max) - Number(this.min);
                let value = (this.lastLeft / maxWidth) * dvalue + Number(this.min);
                this.styleChange(value, true)
                this.drag = false
            }
        },
        endTouchend(e) {
            if (this.disabled) return;
            if (this.drag) {
                let maxWidth = Number(this.width) - Number(this.blockWidth);
                let dvalue = Number(this.max) - Number(this.min);
                let value = (this.lastRight / maxWidth) * dvalue + Number(this.min);
                this.styleSectionChange(value, true)
                this.drag = false
            }
        }
    }
}

// #endif

// #ifdef APP-PLUS|| MP-WEIXIN || H5
export default {}
// #endif
